Finding the Fourth Proportional to 1,510.88, 2,086.44 and 988.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.88 : 2,086.44 = 988.16 : x
2. Step 2: Convert to fraction form
   1,510.88/2,086.44 = 988.16/x
3. Step 3: Cross multiply
   1,510.88x = 2,086.44 × 988.16
4. Step 4: Simplify right side
   1,510.88x = 2,061,736.55
5. Step 5: Solve for x
   x = 2,061,736.55/1,510.88
6. Step 6: Final answer
   x = 1,364.59